<template>
  <div id="app">
    <div class="nav"></div>
  </div>
</template>

<style lang="scss">
$bg:red;
#app{
  width:10rem;
  margin-left: auto;
  margin-right: auto;
}
*{margin:0;padding:0}
.nav{
  width:100%;
  height:88px;
  background: $bg;
}
</style>
